// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_INSPECTOR_STRING_UTIL_H_
#define V8_INSPECTOR_STRING_UTIL_H_

#include <stdint.h>
#include <memory>

#include "src/base/logging.h"
#include "src/base/macros.h"
#include "src/inspector/string-16.h"

#include "include/v8-inspector.h"

namespace v8_inspector {

namespace protocol {

    class Value;

    using String = v8_inspector::String16;
    using StringBuilder = v8_inspector::String16Builder;
    struct ProtocolMessage {
        String json;
        std::vector<uint8_t> binary;
    };

    class StringUtil {
    public:
        static String substring(const String& s, size_t pos, size_t len)
        {
            return s.substring(pos, len);
        }
        static String fromInteger(int number) { return String::fromInteger(number); }
        static String fromInteger(size_t number)
        {
            return String::fromInteger(number);
        }
        static String fromDouble(double number) { return String::fromDouble(number); }
        static double toDouble(const char* s, size_t len, bool* isOk);
        static size_t find(const String& s, const char* needle)
        {
            return s.find(needle);
        }
        static size_t find(const String& s, const String& needle)
        {
            return s.find(needle);
        }
        static const size_t kNotFound = String::kNotFound;
        static void builderAppend(StringBuilder& builder, const String& s)
        {
            builder.append(s);
        }
        static void builderAppend(StringBuilder& builder, UChar c)
        {
            builder.append(c);
        }
        static void builderAppend(StringBuilder& builder, const char* s, size_t len)
        {
            builder.append(s, len);
        }
        static void builderAppendQuotedString(StringBuilder&, const String&);
        static void builderReserve(StringBuilder& builder, size_t capacity)
        {
            builder.reserveCapacity(capacity);
        }
        static String builderToString(StringBuilder& builder)
        {
            return builder.toString();
        }
        static std::unique_ptr<protocol::Value> parseJSON(const String16& json);
        static std::unique_ptr<protocol::Value> parseJSON(const StringView& json);
        static std::unique_ptr<protocol::Value> parseProtocolMessage(
            const ProtocolMessage&);
        static ProtocolMessage jsonToMessage(String message);
        static ProtocolMessage binaryToMessage(std::vector<uint8_t> message);

        static String fromUTF8(const uint8_t* data, size_t length)
        {
            return String16::fromUTF8(reinterpret_cast<const char*>(data), length);
        }

        static String fromUTF16(const uint16_t* data, size_t length)
        {
            return String16(data, length);
        }

        static const uint8_t* CharactersLatin1(const String& s) { return nullptr; }
        static const uint8_t* CharactersUTF8(const String& s) { return nullptr; }
        static const uint16_t* CharactersUTF16(const String& s)
        {
            return s.characters16();
        }
        static size_t CharacterCount(const String& s) { return s.length(); }
    };

    // A read-only sequence of uninterpreted bytes with reference-counted storage.
    // Though the templates for generating the protocol bindings reference
    // this type, js_protocol.pdl doesn't have a field of type 'binary', so
    // therefore it's unnecessary to provide an implementation here.
    class Binary {
    public:
        const uint8_t* data() const { UNIMPLEMENTED(); }
        size_t size() const { UNIMPLEMENTED(); }
        String toBase64() const { UNIMPLEMENTED(); }
        static Binary fromBase64(const String& base64, bool* success)
        {
            UNIMPLEMENTED();
        }
        static Binary fromSpan(const uint8_t* data, size_t size) { UNIMPLEMENTED(); }
    };
} // namespace protocol

v8::Local<v8::String> toV8String(v8::Isolate*, const String16&);
v8::Local<v8::String> toV8StringInternalized(v8::Isolate*, const String16&);
v8::Local<v8::String> toV8StringInternalized(v8::Isolate*, const char*);
v8::Local<v8::String> toV8String(v8::Isolate*, const StringView&);
// TODO(dgozman): rename to toString16.
String16 toProtocolString(v8::Isolate*, v8::Local<v8::String>);
String16 toProtocolStringWithTypeCheck(v8::Isolate*, v8::Local<v8::Value>);
String16 toString16(const StringView&);
StringView toStringView(const String16&);
bool stringViewStartsWith(const StringView&, const char*);

class StringBufferImpl : public StringBuffer {
public:
    // Destroys string's content.
    static std::unique_ptr<StringBufferImpl> adopt(String16&);
    const StringView& string() override { return m_string; }

private:
    explicit StringBufferImpl(String16&);
    String16 m_owner;
    StringView m_string;

    DISALLOW_COPY_AND_ASSIGN(StringBufferImpl);
};

class BinaryStringBuffer : public StringBuffer {
public:
    explicit BinaryStringBuffer(std::vector<uint8_t> data)
        : m_data(std::move(data))
        , m_string(m_data.data(), m_data.size())
    {
    }
    const StringView& string() override { return m_string; }

private:
    std::vector<uint8_t> m_data;
    StringView m_string;

    DISALLOW_COPY_AND_ASSIGN(BinaryStringBuffer);
};

String16 debuggerIdToString(const std::pair<int64_t, int64_t>& debuggerId);
String16 stackTraceIdToString(uintptr_t id);

} //  namespace v8_inspector

#endif // V8_INSPECTOR_STRING_UTIL_H_
